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Table 5 PedsQL™ 4.0 Generic Core Scales Social Functioning Scale Score: Child Self-Report Reliability and Validity

From: How young can children reliably and validly self-report their health-related quality of life?: An analysis of 8,591 children across age subgroups with the PedsQL™ 4.0 Generic Core Scales

Age Reliability Validity
    Chronic Health Condition Healthy Sample   
  n α Mean SD % Floor % Ceiling Mean SD % Floor % Ceiling Chronic vs. Healthy Difference Chronic vs. Healthy Effect Size
5 yrs 749 0.68 74.13 19.31 0.6 15.5 83.39 16.82 0.0 34.8 9.26* 0.55
6 yrs 925 0.68 75.87 20.29 0.0 22.2 81.06 17.73 0.1 29.8 5.19* 0.29
7 yrs 885 0.71 69.58 22.10 1.6 13.4 80.25 18.02 0.0 27.7 10.67* 0.59
8 yrs 876 0.74 78.72 18.65 0.4 19.4 85.00 16.58 0.0 34.1 6.28* 0.38
9 yrs 837 0.79 77.21 20.73 0.0 20.1 84.16 18.54 0.2 36.0 6.96* 0.38
10 yrs 837 0.77 80.08 20.36 0.4 26.1 85.47 16.84 0.0 35.4 5.39* 0.32
11 yrs 680 0.80 80.47 19.65 0.0 25.4 88.53 14.99 0.0 43.6 8.06* 0.54
12 yrs 679 0.78 81.78 19.75 0.0 27.9 87.27 15.47 0.0 37.3 5.48* 0.35
13 yrs 612 0.81 81.32 18.25 0.0 25.9 86.84 16.47 0.0 40.8 5.52* 0.34
14 yrs 571 0.83 78.88 21.53 0.8 25.9 89.82 14.65 0.0 49.2 10.94* 0.75
15 yrs 562 0.81 82.99 17.59 0.0 30.0 89.06 14.49 0.0 45.7 6.07* 0.42
16 yrs 331 0.77 83.37 17.69 0.0 27.0 90.29 12.63 0.0 46.8 6.92* 0.55
  1. Note: Total N = 8,544 for reliability, Total N = 8,308 for validity.
  2. Higher values equal better health-related quality of life.
  3. % Floor/Ceiling = the percentage of scores at the extremes of the scaling range.
  4. Effect sizes are designated as small (.20), medium (.50), and large (.80).
  5. *p < .001 (independent samples t-test).